net.sf.mmm.crypto.symmetric.key

Class SymmetricKeyCreatorImpl<K extends SecretKey>

java.lang.Object

net.sf.mmm.crypto.algorithm.AbstractSecurityAlgorithm

net.sf.mmm.crypto.algorithm.AbstractCryptoAlgorithmWithProvider

net.sf.mmm.crypto.symmetric.key.SymmetricKeyCreatorImpl<K>

Type Parameters:

K - type of SecretKey.

All Implemented Interfaces:

CryptoAlgorithm, KeyCreator, SymmetricKeyCreator<K>

public class SymmetricKeyCreatorImpl<K extends SecretKey>
extends AbstractCryptoAlgorithmWithProvider
implements SymmetricKeyCreator<K>

Implementation of SymmetricKeyCreator.

Since:

1.0.0

Field Summary

Fields

Modifier and Type	Field and Description
private SymmetricKeyConfig	config
private SecretKeyFactory	keyFactory

Fields inherited from class net.sf.mmm.crypto.algorithm.AbstractCryptoAlgorithmWithProvider

provider

Constructor Summary

Constructors

Constructor and Description
SymmetricKeyCreatorImpl(SymmetricKeyConfig config) The constructor.

Method Summary

Modifier and Type	Method and Description
byte[]	asData(K key)
K	createKey(byte[] key)
K	createKey(String password)
String	getAlgorithm()
private SecretKeyFactory	getKeyFactory()
int	getKeyLength()
int	getKeyLength(K key)

Methods inherited from class net.sf.mmm.crypto.algorithm.AbstractCryptoAlgorithmWithProvider

getProvider

Methods inherited from class net.sf.mmm.crypto.algorithm.AbstractSecurityAlgorithm

creationFailedException, creationFailedException, creationFailedException, creationFailedException, getAlgorithm, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.mmm.crypto.symmetric.key.SymmetricKeyCreator

asBinary, verifyKey

Field Detail

config

private final SymmetricKeyConfig config

keyFactory

private SecretKeyFactory keyFactory

Constructor Detail

SymmetricKeyCreatorImpl

public SymmetricKeyCreatorImpl(SymmetricKeyConfig config)

The constructor.

Parameters:

config - the SymmetricKeyConfig.

Method Detail

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface CryptoAlgorithm

Returns:

the name of the underlying algorithm (e.g. "RSA", "NONEwithECDSA", etc.).

See Also:

Key.getAlgorithm(), Signature.getAlgorithm(), MessageDigest.getAlgorithm(), SecureRandom.getAlgorithm(), Cipher.getAlgorithm()

getKeyLength

public int getKeyLength()

Specified by:

getKeyLength in interface KeyCreator

Returns:

the length of the key in bits. The bigger the key length the stronger and more secure the encryption but also the more computation power is required. Reasonable values depend on the algorithm: A recent value for RSA is 4096 bits while for PBKDF2 256 may be sufficient.

getKeyLength

public int getKeyLength(K key)

Specified by:

getKeyLength in interface SymmetricKeyCreator<K extends SecretKey>

Parameters:

key - the SecretKey.

Returns:

the key length of the given key.

createKey

public K createKey(String password)

Specified by:

createKey in interface SymmetricKeyCreator<K extends SecretKey>

Parameters:

password - the secret password.

Returns:

the according SecretKey.

createKey

public K createKey(byte[] key)

Specified by:

createKey in interface SymmetricKeyCreator<K extends SecretKey>

Parameters:

key - the SecretKey as encoded data.

Returns:

the deserialized SecretKey.

asData

public byte[] asData(K key)

Specified by:

asData in interface SymmetricKeyCreator<K extends SecretKey>

Parameters:

key - the SecretKey.

Returns:

the SecretKey

getKeyFactory

private SecretKeyFactory getKeyFactory()